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New Member

BGP Replace-AS feature

I am looking to use the BGP feature neighbor xx.xx.xx.xx local-as no-prepend replace-as command. However my current version of IOS does not allow me to use the "replace-as" portion of the command. Does anyone know what version and IOS type of code I should use? I am currently using a Supervisor720-3BL with IOS 12.2(18)SXE1 (s72033-ipservicesk9-mz.122-18.SXE1.bin). Thanks & Regards

3 REPLIES
Cisco Employee

Re: BGP Replace-AS feature

The replace-as feature support on the 7600 became available in 12.2(33)SRA.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: BGP Replace-AS feature

Sorry chaps, I am still struggling with this one, can anyone advise which feature set of IOS supports this?

Cisco Employee

Re: BGP Replace-AS feature

Grant,

It should be available with all feature sets in 12.2(33)SRA. Note that you have to select the no-prepend knob first as follow:

RouterB(config-router)#nei 1.1.1.1 lo

RouterB(config-router)#nei 1.1.1.1 local-as ?

<1-65535> AS number used as local AS

RouterB(config-router)#nei 1.1.1.1 local-as 2 ?

no-prepend Do not prepend local-as to updates from ebgp peers

RouterB(config-router)#nei 1.1.1.1 local-as 2 no

RouterB(config-router)#nei 1.1.1.1 local-as 2 no-prepend ?

replace-as Replace real AS with local AS in the EBGP updates

RouterB(config-router)#nei 1.1.1.1 local-as 2 no-prepend

Let me know if it fixes your issue,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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